﻿#region Copyright & licence

// This file is part of Refix.
// 
// Refix is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
// 
// Refix is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Lesser General Public License for more details.
// 
// You should have received a copy of the GNU Lesser General Public
// License along with Refix.  If not, see <http://www.gnu.org/licenses/>.
// 
// Copyright (C) 2010-11 David Musgrove and others.

#endregion

using System;
using System.Collections.Generic;

namespace Refix.Core.Structure
{
    public class BinaryReference
    {
        private readonly List<BinaryReference> _references = new List<BinaryReference>();

        public List<BinaryReference> References
        {
            get { return _references; }
        }

        public string Name { get; set; }
        public string OriginalVersion { get; set; }
        public string ResolvedVersion { get; set; }
        public bool IsProjectReference { get; set; }

        public override bool Equals(object obj)
        {
            var other = obj as BinaryReference;
            if (other == null)
            {
                return false;
            }
            return Name == other.Name
                   && OriginalVersion == other.OriginalVersion
                   && IsProjectReference == other.IsProjectReference;
        }

        public override int GetHashCode()
        {
            return Name.GetHashCode()
                   ^ (7 * (OriginalVersion ?? "").GetHashCode()
                   ^ (37 * IsProjectReference.GetHashCode()));
        }

        public void AcceptVisitor(IStructureVisitor visitor)
        {
            visitor.ProcessBinaryReference(this);
            var positionAware = visitor as IPositionAwareStructureVisitor;
            foreach (BinaryReference binaryReference in References)
            {
                if (positionAware != null)
                {
                    positionAware.ProjectParent = false;
                    positionAware.NextPosition = References.PositionOf(binaryReference);
                }
                visitor.Visit(binaryReference);
                if (positionAware != null)
                {
                    positionAware.ProjectParent = false;
                    positionAware.NextPosition = Position.Normal;
                }
            }
            visitor.AfterProcessBinaryReference();
        }
    }
}